Drier



Dec. 4, 1928.

E. P. DECKER DRIER Filed Nov. 17

1 awuwnboz farm/m Rafa/r5? 351 M abtovn Patented Dec. 4, 1928.

UNITED STATES PATENT: OFFICE.

EDWARD :9. Dream, or new man, n. Y. nama.

Application nledNovember 17, 1927. Serial No. 283,814.-

My invention comprises means for accomplishing these results and consists of the combination with a trembling separator over which the material is made to' pass, with means for applying the heat from heated gases to the material as it passes over the separator. The drying operation assists the separation of the finer particles and their consequent accumulation at the bottom of the layer of matriaL' The invention therefore further comprises the combination with such heating and separating means of means for sifting out the finer materials after they have been so forced to' the bottom, the specific means being a sifting'screen, also'of the vibrating and trembling character, acting in conjunction with the vibrating separator heater by being made a continuation thereof. As further heating and vibrating will sepa- 30 rate still more fine material, my invention further comprises a tandem arrangement of "the heating and vibrating separators and sifters, the-number of these duplications that are to beused, being dependent in large measure" on the quality of the raw material and the quality of the productthat is desired to be obtained.

.An embodiment of my invention will now be described with reference to the accompanying. drawings in which I v 1 Figure 1 shows a longitudinal section, and

. Figure 2 shows a transverse section on the line 2.-2 of Figure 1.

An inclined trough 1 'has the material supplied to it at the upper end by any suitable means such as a chute .or hopper 2. At 3 are shown electromagnetic vibrators which are mounted at intervals-over the trough 1 and are adapted by their magnetic pulsations to give to the trough a trembling movement that will resultin the movement of the finer .particlesto the bottom of the materiallayer and the coarser i'ragments' to the top. The bottom of the trough has parts 4; that are made of impervious sheet metaland other of the non-pervious parts 4. Under the nonpe'rvious parts 4 are heating chambers 6 to which hot gases are introduced by pipes 7 and from which the gases escape by pipes 8. The chambers 6 are preferably encased or protected from radiation by non-conducting coverings -9. Under the screening parts 5 are collecting hoppers 10 into which the fine material is de osited as it is shaken through the screens and from such hoppers'the material may be removed in any desired manner I parts 5 of screening that form continuations as, for example, by screws 11. A final hopper and itsscrew 11 is adapted to receive and remove the unscreened material.

In operation, the moist or wet materlal,

as for'example peat in a proper de ee of subdivision, is fed to the separator t rough hopper 2. The vibration of the trough 1 y the magnetic vibrators 3 causes the material to spread out over the bottom of the trough and slowly travel down the whole length of the trough until finally discharged into terminal hopper 12. The bler screens is in itself well-known; but as employed in the present combination it is to be noted that the vibratory im ulses given to the bottom of the trough 4 an the screens 5 im el the pulverulentmaterial upward at a rig 't angle to the direction of travel so that the materlal falls back upon the trough and screen at varying distances along the direc tion-of travel. The coarser particles are impelled a greater distance than the finer particles so that they progress faster in the direc-' tion'of travel and tend to collect their places in thefupper layer, whereas the finer partlcles are not impelled so far and tend to accumulate in the lower layer. This impelling of the finer and coarser particles from the trough bottom and screen repeatedly sepaaction of these tremrates the particles from contact with each other. and exposes them to the drying effect of the radiant heat from the trough bottom and'the absorption of moisture by the surrounding air to which the particles are thus 4 are further dried so that as the material passes ofi the plates 4 and onto the screens 5, the finer particles that have becpme sulficiently dried to be capable of belng sifted through the screen, are thus separated from the traveling layer of material and are collected in the hopper and removed by screws 11. The material passing again over 5 plates 4 will now be freed of the already dried finer particles and will be subject to a more eflicient further drying and separating. In this vvay by successive dryings and removal of fines, the final product will be found to consist of only clean coarse material I claim:

1. A drier comprising in combination, an inclined impervious drying support and an inclined screen forming a continuation of the support, means for vibrating said support and screen to impel the material vertically from the support and screen and causeit to graduall descend and pass the finer articlos to t e bottom, andmeans for app ying heat to the support to dry the fines so that they will more easily pas through the screen.

2. A drier comprising in combination, an inclined impervious drying support and an inclined screen formin a continuation ,of the support, means for vlbrating said. support and screen to impel the material vertically from the support andscreen and cause it to gradually descend and pass the finer particles to the bottom, means for collecting the fines below the screen, and means for applying heat to the support to dry the fines so that they will more easily pass through the screen.

3. A drier comprising in combination, an inclined impervious drying support and an the support, means for vibrating said support and screen to impel the material vertically from the support and screen and cause it to ,gradually descend and pass the finer particles to the bottom, and a heating chamber beneath the support for applying heat to the supinclined screen forming a continuation of- ,port to dry the fines so that they will more easily pass through the screen. T

4. A drier comprising in combination, an I inclined impervious drying support and an inclined screen formin a continuation of the support, means for vibrating said su port and screen to impel the material vertically from the support and screen and cause it to gradually descend and pass the finer particles to the bottom, and a heating chamber with gas inlets and outlets beneath t-he supp for applyin heat tothe supportto uryzu fines so that t ey will more easily pass through" the screen.. r

5. A drier comprising in combination, an inclined impervious drying support and an inclined screen forming a continuation of the support, means for vibrating said support and screen to' impel the material vertically from the support and screen and cause it to gradually descend and pass the finer particles to the bottom, and a heating chamber 'beneath the support for applyin heat to the supportto dry the fines so that t ey will more easily pass through the screen, said chamber having its bottom and sides protected from radiation by heat insulation.

6. A drier for pulverulent material comprising in combination, an inclined material support consisting of a plurality of impervious supports alternatingwith a plurality of screens, means for vibrating said support and screens in a direction at 'a right angle to their surface to impel the pulverulent material directly away frorfi the said surface, receptacles under the screens for receiving the fines, and separate heating means under the supports whereby the material is subjected to a repeated heating'and screening while be- 80 ing vibrated.

EDWARD P. DECKER. 

